"AC Fan" installation always had a lot of components require the user to assemble together in order to achieve a good installation results, but there are some very complex components installed, users install always will be some impact, the most common the problem is to install the bearing housing and the base, in a large number of components, main bearing and base plays a very important role in the balance, so the bearing housing and the installation process centrifugal fan base, you need to pay attention to some details of the installation, in order to more good to ensure the installation results.